Increasing humification and reducing CH4 emission during rice straw fermentation: the role of Streptomyces rochei ZY-2

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Environmental Science and Technology Pub Date : 2024-10-15 DOI:10.1007/s13762-024-06108-3

B. Fu, B. Gao, J. Zhang, H. Huang, Z. Wei, Q. Wang, P. Qu

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引用次数: 0

Abstract

This research aims to explore the effects of ZY-2 inoculant under different aeration intensities on humification process and greenhouse gas emissions during rice straw fermentation by physicochemical and high-throughput pyrosequencing technology. The results showed that the degree of humification was increased by 18.31% and the emission of CH₄ was reduced by 30.21% in the ZY-2 inoculation with 0.3 L min⁻¹ kg⁻¹ organic matter (OM) aeration intensity treatment. Meanwhile, the structure of humus in the inoculation treatments was more complicated due to more polyphenols were participated in the formation of humus. The degradation of cellulose, hemicellulose, and lignin was increased by 35.41%, 23.92%, and 14.67% in the inoculation with 0.3 L min⁻¹ kg⁻¹ organic matter aeration intensity treatment, respectively. Therefore, more amino acids (27%), reducing sugars (26%), and polyphenols (14%) were produced for participating in the formation of humus. The inoculation of ZY-2 with an appropriate aeration intensity reduced the abundance of Tepidimicrobium and Caldicoprobacter that contributed to the emission of CH₄ while enriched Bacillus, Oceanobacillus and Thermobifica for OM biodegradation and humification. Therefore, we concluded that the Streptomyces rochei ZY-2 inoculant combined with 0.3 L min⁻¹ kg⁻¹ OM aeration intensity was an effective strategy to improve the fermentation quality and reduce CH₄ emission during rice straw fermentation.

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来源期刊

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.